What is the best mod that gives you huge massive maps,and has a lot of new civilizations? I saw some, but a lot of people say they don't work is this true? do a lot of mods don't work?

World Of Civilization is my favorite. History In The Making used to be, but they JUST now upgraded to 3.17. And, that mod has bugs that won't allow the game to play. So, for now, stick with WOC.

Amra's Modpack (http://forums.civfanatics.com/showthread.php?t=267748) adds a ton of new civs.

P.S.
This question should be asked somewhere else though... new threads should be for new mods.